CN104058610B - A kind of electric steel furnace slag property optimized handling method - Google Patents
A kind of electric steel furnace slag property optimized handling method Download PDFInfo
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- CN104058610B CN104058610B CN201410216435.XA CN201410216435A CN104058610B CN 104058610 B CN104058610 B CN 104058610B CN 201410216435 A CN201410216435 A CN 201410216435A CN 104058610 B CN104058610 B CN 104058610B
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- furnace slag
- slag
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
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Abstract
The present invention relates to a kind of electric steel furnace slag property optimized handling method, its processing step first gets a certain amount of electric steel furnace slag, and according to weight percent add in electric steel furnace slag 20 ~ 35% calcareous material (in CaO), 0 ~ 2% alumina based material (with Al
2o
3meter), the ferrous material of 0 ~ 5% is (with Fe
2o
3meter) and 0 ~ 2% fusing assistant (with CaF
2meter), grind to form fine powder after common mixing, then at high temperature fine powder is calcined, make, between each component, chemical reaction occurs, cooled fast by air-cooled after having calcined, then fragmentation and grinding are carried out to said mixture, finally obtain the strong white slag of gelation activity.Optimize the mineral composition of white slag, improve the gelation activity of white slag, improve the resource utilization rate of white slag solid waste simultaneously, and be conducive to environment protection.
Description
Technical field
The invention belongs to the technical field of electric steel furnace slag comprehensive utilization, relate to a kind of electric steel furnace slag property optimized handling method, calcine after specifically utilizing calcareous material, alumina based material, ferrous material and fusing assistant and white slag to be mixed and finely ground, make, between each component, chemical reaction occurs, inherently optimize the mineral composition of white slag, improve the gelation activity of white slag.
Background technology
Electric steel furnace slag refers in the reduction period operation of electric-arc furnace steelmaking, the slag formed when adopting the reductive agent such as carbon dust and ferrosilicon powder to carry out diffusive deoxidation, is white powder after cooling efflorescence in atmosphere.Along with the development of China's furnace outer refining technology, the quantity of white slag is also increasing year by year, the accumulation of a large amount of white slag, not only takies a large amount of soil but also cause serious environmental pollution.The essential mineral of white slag consists of: Dicalcium Phosphate (Feed Grade) (γ-C
2s), C 12 A 7 (C
12a
7), gehlenite (C
2aS), lime feldspar (CAS
2), manganolite (C
3mS
2) etc., wherein silicate minerals has certain potential gelation activity, and therefore, white slag is being used as to have good potential basis in cement mixture or concrete admixture etc.But, because the primary silicates ore deposit in white slag is Dicalcium Phosphate (Feed Grade) mutually, and main with γ-C
2s crystal formation exists, and almost non-gelling is active, seriously constrains white slag as the utilization of subsidiary material in cement concrete.Therefore, in the urgent need to a kind of new techniques and methods, the composition of white slag is optimized, improves the high added value resource utilization rate of white slag.
Summary of the invention
For overcoming above-mentioned technical disadvantages, the invention provides after one utilizes calcareous material, alumina based material, ferrous material and fusing assistant and white slag to be mixed and finely ground and calcine, make, between each component, chemical reaction occurs, inherently optimize the mineral composition of white slag, improve the electric steel furnace slag property optimized handling method of the gelation activity of white slag.
The technical solution adopted for the present invention to solve the technical problems is: a kind of electric steel furnace slag property optimized handling method, its processing step is: first get a certain amount of electric steel furnace slag, and according to weight percent add in electric steel furnace slag 20 ~ 35% calcareous material (in CaO), 0 ~ 2% alumina based material (with Al
2o
3meter), the ferrous material of 0 ~ 5% is (with Fe
2o
3meter) and 0 ~ 2% fusing assistant (with CaF
2meter), common mixing is afterwards by grinding to form fine powder, then at the temperature of 1250 DEG C ~ 1500 DEG C, fine powder is calcined, make, between each component, chemical reaction occurs, cooled fast by air-cooled after having calcined, then adopt jaw crusher to carry out fragmentation, adopt ball mill to carry out grinding, finally obtain the strong white slag of gelation activity.
Described calcareous material is mainly calcite, Wingdale and calcareous waste residue, and alumina based material is bauxitic clay and coal gangue mainly, and ferrous material is iron powder and high irony waste residue mainly, and fusing assistant is fluorite mainly.
Described calcareous material chemical composition is mainly CaCO
3or CaO, described alumina based material chemical composition is mainly Al
2o
3, described ferrous material chemical composition is mainly Fe
2o
3, described fusing assistant chemical composition is mainly CaF
2.
After described calcining, white slag Free CaO content is less than 2%.
After described calcining, white slag is milled to Blain specific surface is 350 ~ 450m
2/ kg.
The invention has the beneficial effects as follows: after utilizing calcareous material, alumina based material, ferrous material and fusing assistant and white slag to be mixed and finely ground, issue biochemical reaction at high temperature action; inherently optimize the mineral composition of white slag; improve the gelation activity of white slag; improve the high added value resource utilization rate of white slag solid waste simultaneously; and be conducive to environment protection; white slag powder prepared by the inventive method; material or concrete admixture can be mixed as cement, be widely used in the construction projects such as industry and covil construction, water conservancy and road.
Embodiment
Below in conjunction with embodiment, the present invention is further described.
A kind of electric steel furnace slag property optimized handling method, its processing step is: first get a certain amount of electric steel furnace slag, and according to weight percent add in electric steel furnace slag 20 ~ 35% calcareous material (in CaO), 0 ~ 2% alumina based material (with Al
2o
3meter), the ferrous material of 0 ~ 5% is (with Fe
2o
3meter) and 0 ~ 2% fusing assistant (with CaF
2meter), common mixing is afterwards by grinding to form fine powder, then at the temperature of 1250 DEG C ~ 1500 DEG C, fine powder is calcined, make, between each component, chemical reaction occurs, cooled fast by air-cooled after having calcined, then adopt jaw crusher to carry out fragmentation, adopt ball mill to carry out grinding, finally obtain the strong white slag of gelation activity.
Described calcareous material is mainly calcite, Wingdale and calcareous waste residue, and alumina based material is bauxitic clay and coal gangue mainly, and ferrous material is iron powder and high irony waste residue mainly, and fusing assistant is fluorite mainly.
Described calcareous material chemical composition is mainly CaCO
3or CaO, described alumina based material chemical composition is mainly Al
2o
3, described ferrous material chemical composition is mainly Fe
2o
3, described fusing assistant chemical composition is mainly CaF
2.
After described calcining, white slag Free CaO content is less than 2%,
After described calcining, white slag is milled to Blain specific surface is 350 ~ 450m
2/ kg.
In order to inquire into the effect of the application's electric steel furnace slag property optimized handling method further, the original white slag choosing the discharge of Shaoguan Iron And Steel Company is tested, and the chemical constitution of this original white slag is: CaO:53.44%, SiO
2: 27.4%, Al
2o
3: 5.27%, Fe
2o
3: 0.60%, MgO:6.57%, MnO:0.51%, SO
3: 2.32%, f-CaO:0.49%, loss on ignition 2.48%, other are 3.4% years old.
embodiment 1:
With original white slag for benchmark, regulate material Wingdale (counting 23.4% with CaO), bauxitic clay (with Al according to weight percent to addO-on therapy in original white slag
2o
3count 1.5%) and iron powder (with Fe
2o
3count 4.4%), common combined grinding, calcines at 1350 DEG C, insulation 30min; Cooled fast by air-cooled after having calcined; Then adopt jaw crusher to carry out fragmentation, adopt ball mill to carry out grinding, grinding to Blain specific surface is 350 ~ 450m
2/ kg.
Be mixed with gelling material by w (reference cement): w (white slag)=70%:30%, carry out glue sand performance test according to (GB/T17671-1999) " Test method for strength of hydraulic cement mortar (ISO method) ".
embodiment 2:
With original white slag for benchmark, regulate material Wingdale (counting 32.3% with CaO), bauxitic clay (with Al according to weight percent to addO-on therapy in original white slag
2o
3count 1.5%) and iron powder (with Fe
2o
3count 4.4%), common combined grinding, calcines at 1350 DEG C, insulation 30min; Cooled fast by air-cooled after having calcined; Then adopt jaw crusher to carry out fragmentation, adopt ball mill to carry out grinding, grinding to Blain specific surface is 350 ~ 450m
2/ kg.
Be mixed with gelling material by w (reference cement): w (white slag)=70%:30%, carry out glue sand performance test according to (GB/T17671-1999) " Test method for strength of hydraulic cement mortar (ISO method) ".
embodiment 3:
With original white slag for benchmark, regulate material Wingdale (counting 20% with CaO) and fluorite (with CaF according to weight percent to addO-on therapy in original white slag
2count 1%), common combined grinding, calcines at 1300 DEG C, insulation 2h; Cooled fast by air-cooled after having calcined; Then adopt jaw crusher to carry out fragmentation, adopt ball mill to carry out grinding, grinding to Blain specific surface is 350 ~ 450m
2/ kg.
Be mixed with gelling material by w (reference cement): w (white slag)=70%:30%, carry out glue sand performance test according to (GB/T17671-1999) " Test method for strength of hydraulic cement mortar (ISO method) ".
embodiment 4:
With original white slag for benchmark, in original white slag, addO-on therapy regulates material Wingdale (counting 30% with CaO) and fluorite (with CaF
2count 1%), common combined grinding, calcines at 1300 DEG C, insulation 2h; Cooled fast by air-cooled after having calcined; Then adopt jaw crusher to carry out fragmentation, adopt ball mill to carry out grinding, grinding to Blain specific surface is 350 ~ 450m
2/ kg.
Be mixed with gelling material by w (reference cement): w (white slag)=70%:30%, carry out glue sand performance test according to (GB/T17671-1999) " Test method for strength of hydraulic cement mortar (ISO method) ".
The Main physical Performance comparision of above-mentioned four examples activation white slag and former white slag
This physicals comparative descriptions can obtain the strong white slag of gelation activity after using the application's process, the present invention utilizes calcareous material, alumina based material, biochemical reaction is issued at high temperature action after ferrous material and fusing assistant and white slag are mixed and finely ground, inherently optimize the mineral composition of white slag, improve the gelation activity of white slag, improve the high added value resource utilization rate of white slag solid waste simultaneously, and be conducive to environment protection, white slag powder prepared by the inventive method, material or concrete admixture can be mixed as cement, be widely used in industry and covil construction, the construction project such as water conservancy and road.
Claims (4)
1. an electric steel furnace slag property optimized handling method, is characterized in that processing step is: first get a certain amount of electric steel furnace slag, and in electric steel furnace slag, adds 20 ~ 35% in the calcareous material of CaO, 0 ~ 2% with Al according to weight percent
2o
3the alumina based material, 0 ~ 5% of meter is with Fe
2o
3the ferrous material and 0 ~ 2% of meter is with CaF
2the fusing assistant of meter, common mixing is afterwards by grinding to form fine powder, then at the temperature of 1250 DEG C ~ 1500 DEG C, fine powder is calcined, make, between each component, chemical reaction occurs, cooled fast by air-cooled after having calcined, then adopt jaw crusher to carry out fragmentation, adopt ball mill to carry out grinding, finally obtain the strong white slag of gelation activity.
2. electric steel furnace slag property optimized handling method as claimed in claim 1, is characterized in that: described calcareous material chemical composition is mainly CaCO
3or CaO, described alumina based material chemical composition is mainly Al
2o
3, described ferrous material chemical composition is mainly Fe
2o
3, described fusing assistant chemical composition is mainly CaF
2.
3. electric steel furnace slag property optimized handling method as claimed in claim 1, is characterized in that: the white slag Free CaO content of described acquisition is less than 2%.
4. electric steel furnace slag property optimized handling method as claimed in claim 1, is characterized in that: it is 350 ~ 450m that the fine powder after described calcining is milled to Blain specific surface
2/ kg.
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| CN106012742B (en) * | 2016-05-26 | 2018-04-03 | 新疆交通建设集团股份有限公司 | A kind of technique using refining furnace white slag stabilization processes cement stabilization layer |
| CN108558246A (en) * | 2018-01-12 | 2018-09-21 | 韶关学院 | A kind of electroslag base mineral admixture and the preparation method and application thereof |
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| CN1831147A (en) * | 2006-04-14 | 2006-09-13 | 贵州达众第七砂轮有限责任公司 | Method for producing slag forming agent contg. high calcium and low silicone by corundum arc furnace |
| CN101560578A (en) * | 2009-05-19 | 2009-10-21 | 华南理工大学 | Performance adjustment material for activating steel slag at high temperature and application thereof |
| CN101792274A (en) * | 2010-03-19 | 2010-08-04 | 华南理工大学 | Calcium-silicon-aluminum property regulating material for carrying out on-line high-temperature reconstruction on medium-alkalinity steel slag and application thereof |
| CN101935740A (en) * | 2010-09-21 | 2011-01-05 | 攀枝花钢城集团有限公司 | White slag refining agent for LF (Ladle Furnace) refining furnace and preparation method thereof |
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| JPS541487B2 (en) * | 1974-03-11 | 1979-01-25 | ||
| JPS5549019B2 (en) * | 1974-07-15 | 1980-12-09 |
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| CN1831147A (en) * | 2006-04-14 | 2006-09-13 | 贵州达众第七砂轮有限责任公司 | Method for producing slag forming agent contg. high calcium and low silicone by corundum arc furnace |
| CN101560578A (en) * | 2009-05-19 | 2009-10-21 | 华南理工大学 | Performance adjustment material for activating steel slag at high temperature and application thereof |
| CN101792274A (en) * | 2010-03-19 | 2010-08-04 | 华南理工大学 | Calcium-silicon-aluminum property regulating material for carrying out on-line high-temperature reconstruction on medium-alkalinity steel slag and application thereof |
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